Archer MR600 4G+ (AC 1200 Dual Band Gigabit Router) not working as expected. I am from Haryana (INDIA). I am using Airtel SIM for this router (at my location Airtel provides 4G+/5G Network). I have done lots of troubleshooting/update etc in order to get 4G+ signal on this router but nothing worked. On router's login console I checked the Bands, the available Bands are B1, B5 & B40 (Airtel). I tried selecting them manually but to no avail. I also checked ISP version. Current ISP version is 22081501. The Firmware version is the latest one. 

Now I don't know what to do. Can anybody help ?